You are downloading Wammu source code. Before you can run Wammu, you need to have installed Gammu with python bindings, Python and wxPython. There are also some optional requirements for additional features which are listed in INSTALL file in sources. This file also contains more detailed instructions about installing Wammu.
Released on okt. 8, 2014, see detailed information.
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Should you be interested in git access or git snapshots, you can find them on development page.